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This exam was created by a large language model. Please use it with caution, as inaccuracies may be present. Always verify critical information.

What is the main function of the skeletal system?

Select one option

To pump blood

To break down food

To provide support and protection

To help us breathe

Which body system is responsible for breaking down the food we eat?

Select one option

Circulatory system

Nervous system

Digestive system

Respiratory system

The heart is an organ that belongs to which body system?

Select one option

Skeletal system

Muscular system

Circulatory system

Nervous system

What gas do our lungs take in from the air?

Select one option

Carbon dioxide

Nitrogen

Oxygen

Hydrogen

The brain is part of the nervous system and is responsible for:

Select one option

Pumping blood

Helping digest food

Controlling body movements and thoughts

Filtering waste

Which of the following is an example of a producer in an ecosystem?

Select one option

A fox

A mushroom

A grass plant

A rabbit

What is a habitat?

Select one option

A type of food an animal eats

The place where an organism lives and finds what it needs to survive

A group of animals living together

The way an animal moves

Organisms that break down dead plants and animals are called:

Select one option

Producers

Consumers

Decomposers

Carnivores

Which of these is an abiotic factor in an ecosystem?

Select one option

A tree

A bird

Sunlight

A worm

10.

What does a food chain show?

Select one option

How animals sleep

How energy flows from one living thing to another

How plants grow

How animals communicate

11.

A mixture is when two or more substances are combined, but they:

Select one option

Chemically change into a new substance

Keep their original properties and can be separated

Always dissolve into each other

Become invisible

12.

What is a solution?

Select one option

A mixture where particles are easily seen

A mixture where one substance dissolves evenly into another

A solid that cannot be dissolved

A gas that is mixed with a liquid

13.

Which of these is an example of a solution?

Select one option

Sand and water

Oil and water

Salt dissolved in water

Rocks and dirt

14.

How can you separate sand from water in a mixture?

Select one option

By heating it until the sand disappears

By using a magnet

By pouring the water through a filter

By stirring it faster

15.

In a saltwater solution, what is the salt called?

Select one option

The solvent

The solute

The mixture

The liquid

16.

How long does it take for Earth to make one complete orbit around the Sun?

Select one option

1 day

1 month

1 year

1 hour

17.

What causes day and night on Earth?

Select one option

The Moon orbiting Earth

The Sun moving around Earth

Earth rotating on its axis

Clouds blocking the Sun

18.

We see different phases of the Moon because:

Select one option

The Moon changes its shape

The Earth casts a shadow on the Moon

We see different amounts of the Moon lit by the Sun as it orbits Earth

The Moon gets closer and farther from Earth

19.

Which of these describes a planet?

Select one option

A large rock orbiting a planet

A small, icy body that orbits the Sun

A celestial body that orbits a star, is round, and has cleared its orbit

A star that gives off its own light

20.

The Sun is an example of a:

Select one option

Planet

Moon

Comet

Star

21.

Explain the difference between a producer and a consumer in an ecosystem. Give one example of each.

22.

Describe how your lungs and circulatory system work together when you exercise.

23.

Imagine you have a mixture containing iron filings, sand, and salt. Describe the steps you would take to separate each of these three components.

24.

Explain why we see different phases of the Moon throughout a month. You can draw a simple diagram in your answer if it helps.

25.

Why is it important for scientists to share the results of their experiments and research with other scientists?

Bean Plant Growth Experiment

Ms. Davis's 5th-grade class wanted to find out which type of soil is best for growing bean plants. They designed an experiment.

They prepared three identical pots.

Pot A had soil from a garden.
Pot B had sandy soil.
Pot C had potting mix from a store.

They planted one bean seed in each pot. They placed all three pots on the same windowsill so they received the same amount of sunlight. They watered each plant with 50 mL of water every two days. After three weeks, they measured the height of each plant.

Here are their results:

Pot	Type of Soil	Plant Height after 3 Weeks (cm)
A	Garden Soil	12
B	Sandy Soil	5
C	Potting Mix	18

26.

Based on the experiment description, what was the students' hypothesis? (What did they think would happen?)

27.

Identify the independent variable and the dependent variable in this experiment.

28.

What are two things the students did to make sure their experiment was a fair test?

29.

Based on the data table, which type of soil seemed to be the best for growing bean plants in this experiment? Explain your answer using the data.

30.

If the students wanted to conduct another experiment to confirm their findings, what is one change they could make to their experimental setup to improve it?